subtract 3 x square- 2x + 5 x y-7 from 8 - 9 x y + 3 x square-5 x
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(8 - 9xy + 3x² - 5x) - (3x² - 2x + 5xy - 7)
= (3x² - 9xy - 5x + 9) - (3x² + 5xy - 2x - 7)
= 3x² - 9xy - 5x + 9 - 3x² - 5xy + 2x + 7
= 3x² - 3x² - 9xy - 5xy - 5x + 2x + 9 + 7
= -14xy - 3x + 16
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this is the correct answer
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